It looks like this thread is wrapping up, but I wanted to end with something that's very important to me and to all good breeders: the relationship between breeders and rescue, and what you should look for when you are considering that next puppy.
There's an opinion that no dogs should be produced while any remain homeless, and I have a lot of sympathy with that. There's also an opinion that breeders contribute to rescue (after all, many of the dogs in rescue--in high-end areas the majority--are purebred). It all ends up being an "us versus them" feeling, as though there's a phalanx of breeders staring down the PetFinder website, with all the homeless dogs looking back accusingly.
If you decide to buy a purebred dog from a breeder, it's your responsibility to make sure that you are not supporting anyone who is letting his or her dogs contribute to the rescue population.
If you're seriously considering a purebred, I think you already know why I disagree that no dogs should be produced while some are homeless--there is a legitimate need for dogs that are predictable in looks, temperament, ability to work, and who come with breeder support and education. I would NEVER discourage someone from adopting a Dane rather than buying one, but there are many families who feel that the unknown is just too much of a liability. They need someone who will be there for them and their dog and who knows all the answers to their questions, and as wonderful as rescue people almost always are, Danes coming into rescue are usually a big question mark. And of course for those who show and breed, a properly bred dog is a must.
Where things get more dangerous is when a breeder does not protect puppies from contributing to rescue. When you interview a breeder, one of the FIRST conversations should involve (and I think a breeder should bring it up) the fact that this dog can never go anywhere but back to the breeder. Not to your kind neighbor, not to parents or cousins, only back to the breeder. I don't even let dogs go to exes in a divorce if I originally sold the dog to one spouse--it has to come back to me, and the ex has to act like a new prospective owner and prove to me that he or she will be a good home.
You should also get the feeling that if you breed this animal without permission, disaster will rain from the sky (liquified damages, reposession of the dog, the breeder on your doorstep, blacklisting from ever owning a puppy of that breed again). You should never be able to "buy" breeding rights (by upping the price), and you should never be offered a puppy on full registration (that's the AKC category that allows the animal to be bred) unless you are going to be showing it, and most breeders won't let a puppy go on full registration without a co-ownership (the breeder's name stays on the puppy for its life).
While I often use the word "show" breeder to mean a reputable purebred breeder, you need to watch out for them too. I know breeders who produce some of the most beautiful and biggest-wining Danes in the country, and I wouldn't take one of their dogs for love nor money because I know that they're scattering dogs all over the northern hemisphere with no regard for where those poor babies end up. A show breeder, no matter how well known, must demonstrate a steadfast commitment to never contributing to rescue.
So now--go forth! To Petfinder and local shelters and to waiting lists for reputable breeders! Blessings on your search.